[API View] Expose endpoints to be used on mcp and cli

[AlitzelMendez]

effort related to #12111

[Copilot]

Pull Request Overview

This PR exposes API endpoints to support MCP (Model Context Protocol) and CLI usage by adding token-based authentication options for existing functionality.

• Added a new GetReviewIdForRevision endpoint to retrieve review IDs from revision IDs
• Moved the GetReviewContentAsync endpoint to a new hybrid authentication controller that supports both token and cookie authentication
• Cleaned up the original ReviewsController by removing unused dependencies and the moved endpoint

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
ReviewsHybridAuthController.cs	New controller with hybrid authentication for the GetReviewContentAsync endpoint
ReviewsController.cs	Removed GetReviewContentAsync method and cleaned up unused dependencies
APIRevisionsTokenAuthController.cs	Added GetReviewIdForRevision endpoint for token-authenticated access

[tjprescott]

Some API design issues still need ironing out. Also, I think it would be helpful if we created a TypeSpec file for our public API to aid in review. The architects have said many times "why do we not review the API for the tool we use to review APIs?".